I don't think it matters. I fly the Pitts mainly with my right hand on the stick and left for the throttle when needed, but in cruise I'll sometimes swap over (not that you do MUCH cruising in the Pitts but you have to get to and from the practice area).
My 182 I fly with my left hand on the yoke, right hand for throttle, radio etc.
I learned Acro on a 115 and that was left hand for the stick, right for the throttle. I also flew an SR20 for a while (not impressed), and that was LH for the side-yoke, RH for the throttle etc.
I've never flown from the right seat but if I did I guess I'd fly with my right hand - if it's a side-stick or -yoke you don't have much choice.
Incidentally the Marchetti is also a side-by-side plane with primary flying on the right, for the same reason as the RAF 115s.
n5296s / n15ta (in this case)